Improper access control in Gutenberg Blocks - Ultimate Addons for Gutenberg plugin for WordPress

1) Improper access control

EUVDB-ID: #VU26747

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in several AJAX actions in the "ultimate-addons-for-gutenberg/classes/class-uagb-admin.php" script. A remote authenticated attacker can send a $_POST['page'] = 'uag' to the current page and interact with all six AJAX actions, leading to settings change.

This vulnerability affects the following AJAX actions:

• uagb_activate_widget
• uagb_deactivate_widget
• uagb_bulk_activate_widgets
• uagb_bulk_deactivate_widgets
• uagb_allow_beta_updates
• uagb_file_generation

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gutenberg Blocks – Ultimate Addons for Gutenberg: 0.0.1 - 1.14.7

External links

http://wpvulndb.com/vulnerabilities/10170/
http://blog.nintechnet.com/wordpress-ultimate-addons-for-gutenberg-plugin-fixed-vulnerability/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.